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Two forces 3N and 4N are acting on a poi...

Two forces 3N and 4N are acting on a point O. if angle between these two forces is `90^@` find the resultant of these two forces.

Text Solution

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`F=sqrt(F_1^2+F_2^2+2F_1F_2 cos 90^@)`
`=sqrt(3^2+4^2+2 times 3 times times 4 times 0)=sqrt(3^2+4^2)`
`implies F=5N`
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